Shimano wheel bring robust performance to any trail. Smooth-rolling labyrinth seal hub. Technologies Center Lock - The Center Lock system makes an easy rotor installation possible with spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency. Features Shimano Performance MTB wheel for everyone Wider and lighter 24C wide-profile rim for more tire rigidity and traction optimised for trail riding More than 100 g lighter (per bike vs. WH-MT15) Grease holding function Internal grease sleeve HG spline Specifications Average Weight 1147g Colour Rim: Black Hub Shell: Black Quick Release: Black Spokes J-Bend Brake Type Center Lock Disc Axle Fixing Method Quick Release O.L.D. 135mm Rear Speeds 8-10-speed, MTB 11-speed*** Quick release skewer length 168mm, 173mm Front/Rear Rear Reflector AS: CATEYE RR-550-WUA SW DIN: CATEYE RR317-WUA SW JIS/CPSC: CATEYE RR-550-WUW SW Rim Height Height: 21mm Requires Rim Tape: X (24 – 584) Joint: Sleeve Width: 29.6mm Seal Hub: Labyrinth & Contact Spokes Butted: 2.3 Number: 24 Diameter: 2.3mm Tyre Recommended size: 27.5 × 2.00 – 2.40 Type: Clincher Wheel Size 584 × 24C (650B = 27.5 inch) Rim External Width: 29.6mm Internal Width: 24mm Engagement Type Pawl ratchet